Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bcb404dcd06bf4…

MALICIOUS

PDF

67.9 KB Created: 2021-02-16 21:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1c2603b05b046c1bcd89fde421b66e7f SHA-1: d90bdb3a5a8c40246902b0fa79e6164c3ea0b669 SHA-256: 34bcb404dcd06bf412d195b2315f73f558a9a88d4f1d8d58882af5834e703cd1
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=word+problems+linear+inequalities+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475000/normal_5ff0b59a0497b.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/7e0171.pdfIn PDF document text
    • https://kotezoxeruv.weebly.com/uploads/1/3/5/3/135345651/funipimama_vaxivi_dusefodunabasa.pdfIn PDF document text
    • http://kemytbok.xyz/que_es_el_cariotipo_humanoun4hl.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/maxikulu_gurevozonunetiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476150/normal_5feb648245f81.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/Zgefiib/martial_arts_brutality.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/X1MRqDo/66206646071.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5fefd0fa51384.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/4130af327.pdfIn PDF document text
    • https://funexoxep.weebly.com/uploads/1/3/2/3/132303151/xalamalexax-tikit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_5fd7ef74c9e8e.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/finifirizix_ketiridawonibik_gomixisujavuga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7E 5636 bytes
SHA-256: f5d711d994783d5d3839ef9c0dd54eac93852c48b52c3e2e7c07c16f893a304b
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 10760 bytes
SHA-256: 73a6725510a66f8e2eca9e9a4d53ee4e19d7371a0d62102c3594a0a9cb7f620e